C8051F850-C-GM Datasheet, PDF (13/328 Pages) Silicon Laboratories – Low-Cost 8-bit MCU Family with up to 8 kB of Flash

Table 1.5. Internal Oscillators
Parameter
Symbol
Test Condition
Min
High Frequency Oscillator (24.5 MHz)
Oscillator Frequency
f_HFOSC
Full Temperature and 24
Supply Range
Power Supply Sensitivity
PSS_HFOSC
T_A = 25 °C
—
Temperature Sensitivity
TS_HFOSC
V_DD = 3.0 V
—
Low Frequency Oscillator (80 kHz)
Oscillator Frequency
f_LFOSC
Full Temperature and 75
Supply Range
Power Supply Sensitivity
Temperature Sensitivity
PSS_LFOSC
T_A = 25 °C
—
TS_LFOSC
V_DD = 3.0 V
—
Typ
24.5
0.5
40
80
0.05
65
Max Unit
25
MHz
—
%/V
— ppm/°C
85
kHz
—
%/V
— ppm/°C
Table 1.6. External Clock Input
Parameter
Symbol
External Input CMOS Clock
Frequency (at EXTCLK pin)
f_CMOS
External Input CMOS Clock High Time t_CMOSH
External Input CMOS Clock Low Time t_CMOSL
Test Condition
Min Typ Max Unit
0
—
25
MHz
18
—
—
ns
18
—
—
ns
Rev. 1.0
12